Pump



Patented Oct. 9, 1934 PUMP Charles Bell Walker, Banbury, EnglandApplication February 17, 1934, Serial No. 711,662

In Great Britain 2 Claims.

This invention relates more especially to means for supplying waterunder high pressure for car washing, but is applicable also to supplyingwater I for other purposes and to supplying compressed air for inatingtyres or other purposes.

The object of the invention is to provide a pumping unit which can beapplied at will toV the motor vehicle in driving association with thevehicle engine, for supplying water or air or both.

- Preferably the driving shaft of the pump is coupled to the front ofthe engine shaft of a motor in the position usually occupied byv thestarting handle, the arrangement being such that the action of pushingthe pump into operative position automatically establishes the drivingconnection and locks the casing of the pump against rotation, in suchposition that it may be run by the vehicle-engine at the speed required.

In the case of many motor vehicles the shank of the starting handlepasses through a bearing or support carried by the vehicle, and a peg orpegs of the inner end of the handle shank is or are adapted to engagewith one-way slanted teeth or notches on the forward end of the engineshaft or a fitting which is screwed or otherwise secured thereto. Inother cases the peg is on the engine shaft and the teeth or notches onthe starting handle. In either case the means for coupling the rear endof the pump shaft to the engine shaft may be similar to those forcoupling the starting handle to the engine shaft but they must, ofcourse, be such that they will transmit drive from the engine shaft tothe pump shaft.

The coupling between the pump shaft and the i engine shaft mayalternatively comprise a quick thread on the one part screwing into acounterpart thread on the other part.

The pump casing has a rearwardly extending tube to act as a bearing forthe pump shaft, and also adapted to enter, as a sliding t, into the saidbearing or support which normally vreceives the handle shank, or intoany other suitable support. Means must be provided to prevent the pumpcasing from revolving under torque reaction. Any convenient means may beadapted for this purpose, such as the provision of a key or projectionto fit into the slot which is often provided to clear the peg on thestarting handle, or an arm may be attached to the pump casing to bearagainst the radiator cowl or other part of the car frame. Anyalternative may be adopted to prevent the pump casing from rotating.

The above method of attaching the pump need not in any way interferewith the starting handle when the pump is removed.

December 24, 1932 (Cl. 10S- 54) Any high pressure pump may be utilizedin carrying out the invention, but I prefer to utilize a rotary pump inwhich there is a cylinder rotated about an axis which is transverse tothe cylinder axis and said cylinder containing a piston rotating on anaxis parallel to the axi s on which the cylinder rotates but eccentricthereto, thus ltol cause the piston to move endwise in relation to thecylinder.

A convenient application of the invention toa water pump for car washingis described with reference to the drawing herewith in which:-

Figure 1 is alrear end view of prising a rotary water pump.

Figure 2 is a longitudinal sectio a fitting comn of the fitting,

the section being taken on the line 2, 2 of Figure In this view the partcomprising the short shaft and slipper head for supporting-the piston isshown in elevation.

Figure 3 is a section taken in `cated by the line 3, 3, of Figure 2 theplane indi- `and looking in the direction of the arrow of that figure.

Figure 4 is a o being taken in the plane indicate 4, of Figure 1. Inthis view also port is shown in elevation.

sectionalplan view, the section d bytheline 4, the piston sup- Figure 5is a view corresponding to Figure 4 but showing in section a fittingsecured to the front end of the engine shaft. and engaging rear end ofthe pump shaft.

Figure 6 is a section taken inthe plane inclicated by the line 6, 6, ofFigures 4 and 5. Figure '7 is a view in front elevation to illustratethe shape of a recess in a motor vehicle; and

front plate of a Figure 8 is a sectional view to illustrate analternative form of coupling between the pump shaft and the engineshaft.

Referring to Figures 1 to 7, A

tary pump of a type prises a casing B divide indicates a roalreadyknown. It comd into two portions b b',

the latter having a rearward tubular extension which The portions b b'are secured together by wn. C is a ror bore c (which is adapted topiston c which has a transverse slot c2 in which slides a slipper c3stud a which rotates in pins d to a flange e ofa shaft the tube b2.

integral with an eccentrically mounted a bearing a' in the fore end ofthe casing. The block C is secured by E rotatable in The flange e andthe forward face of the shaft E form one of the cylinder walls.

The effect of rotating the shaft E is to rotate the cylinder block andYcause the piston to move endwise in relation to the cylinder in a manneralready known. At the sides of the casing are two ports, one an outletport f and the other anv having two slanted notches it cut in its end.It will be seen that the shaft E extends a short tance beyond the ttingH.

On the front end of the enginew shaft Jv screwed and pinned a hollowfitting K` (seeFigure i eration by 'alvehicle having an engine shaft and5) with two inwardly projecting studs lc which are adapted to engage inthe notches h'fofsthe fitting H. Y f

When it is required to use the pump', such as for car washing, the rearend of thetubularextension is passed in through the known recess My (seeFigure 7), and thenotches h; are engaged by ktherstuds lc (see Figure).v.When the pump is in this position its fins g lie lin the usual gatingsm whereby theY casingcannot turnfinrela.-

tion ltothe vehicle.`v The direction ofthe'fslaint of the notches hAis-suchthat the rotation vof the engine shaft tends to keep the,pumpnnit in place.

It will be seen that no additional parbhas to be added lto thevehiclerwhen this typegof starting handlecoupling is used. The handlesimply has the notches sloped the oppositeway. The extreme end of thepump shaft E entersthe usual bore formed in'the engine shaft lfor. thepurpose of centralizing the handlefor pump shaft; P (seeFigure 3)indicates a known form ofby- Y pass valve which by-passes water from theoutlet port to the inlet port should the pressure become excessive suchfor instance as would be the vcase if the water jet nozzle becamestopped up.v

The modiiications shownpin Figure` 8 is adapty f ed to a vehicle inwhich teethV or notches are 'f. .u Y v l Y auVv fes 1 vided [with sidewalls provided on the front end of the engine shaft to receive radialstuds of the end of the starting handle. In this case, a sleeve Q isscrewed and pegged over the front end of the engine shaft and in suchposition as to project forwards of the end of the engine shaft. In suchextended portion q are cut notches q adapted to engage radial studs rA.of the. rear end of the pump shaft E, suchfstuds, of course,projecting radially outwards further than the radial studs of thestarting handle, the latter being such that they can pass into theextension q without entering the notches q.

" What I claim and desire to secure by Letters Patentis.- v

'1. A rotary pump for attachment to and opaA fixed member provided withan opening in itsVsida-saidpump comprising a casing, ka movable `pumping`member within said casing, and apump shaft connected to said pumpingmemberand -having a portion adapted to extend through ksaid opening,means on the end of said shaft portion' engageable by relativelongitudinal movement between the shaft portion and the engine shaft toengage the end of the engine shaft, said last meansholding Ysaid pumpshaft against said engine'shaft'when the engine shaft is rotating,V saidcasing having a portion surrlcundingrsaid shaftand adapted to extendintol said opening, said last portion having a vrib adapted to enterlsaid notch and thereby to lock the casing against rotation. 4A2. In anarrangement according toclaim 1 wherein 4vthe engine shaft has pinsthereon arranged radially withrespect thereto, said engagingmeanscomprising a member on the end of saidfshaft portion having a notchtherein prol 1 both of which slope with respect to the axis of the shaftportion.

CHARLES BELL WALKER.

